OF THE BRAIN, ETC. 11 



EXPERIMENT VII. 



I procured two large full grown rabbits, of 

 the same colour, and so nearly equal in size, that 

 no difference could be detected by the eye. 



The temperature of the room was 57, and 

 the heat in the rectum of each rabbit previously 

 to the experiment was 100^. 



I divided the spinal chord in one of them, 

 produced artificial respiration, and removed the 

 head, after having secured the vessels in the 

 neck. The artificial respirations were made 

 about 35 times in a minute. 



During the first hour, the heart contracted 

 144 times in a minute. 



At the end of an hour and a quarter the pulse 

 had fallen to 136 in a minute, and it continued 

 the same at the end of an hour and a half. At 

 the end of an hour and 40 minutes the pulse 

 had fallen to 90 in a minute, and the artificial 

 respiration was discontinued. 



Half an hour after the spinal chord had been 

 divided, the heat in the rectum had fallen to 97. 



At 45 minutes it was 95^-. 



At the end of an hour the heat in the rectum 

 was 94. 



At an hour and a quarter it was 92. 



At an hour and a half it was 91. 



At an hour and 40 minutes, the heat in the 

 rectum was 90^, and in the thorax, within the 

 bag of the pericardium, it was 87^-. 



The temperature of the room being the same, 



